Scientifically, someone would have to be completely devoid of the ability to produce dopamine in order to be totally devoid of self-interest. Even someone like Mother Teresa gets a shot of dopamine for doing something that makes her feel good.

It's basic animal nature to be self-interested.

You could find a much better example than Agnes Bojaxhiu~

__________________The Trump campaign and Black Lives Matter movement are perfect for each other. Both sides filled with easily led and angry nitwits convinced they are victims~